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Barriers Before Infection

Barriers Before Infection

Comparison of a leaf waxy cuticle, a cellulose cell wall and layers of bark blocking pathogen entry Physical plant defences are structures that prevent pathogens from reaching living tissue. They act before infection becomes established.

5.2.1 Physical plant defences Lesson

  1. GCSE
  2. /Biology
  3. /5.2.1 Physical plant defences

Step-by-step lessons on Edexcel GCSE Biology 5.2.1 Physical plant defences. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons